libpulse_plugin: Fix linking against pulseaudio.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

modules/audio_output/Modules.am

@@ -26,7 +26,7 @@ endif
 
 libpulse_plugin_la_SOURCES = pulse.c
 libpulse_plugin_la_CFLAGS = $(AM_CFLAGS) $(PULSE_CFLAGS)
-libpulse_plugin_la_LIBADD = $(AM_LIBADD) $(PULSE_LIBADD)
+libpulse_plugin_la_LIBADD = $(AM_LIBADD) $(PULSE_LIBS)
 libpulse_plugin_la_DEPENDENCIES =
 if HAVE_PULSE
 libvlc_LTLIBRARIES += libpulse_plugin.la